Metabo TNS 150 W Instrucciones De Servicio página 11

7
1 Manufacturer's address or stamp
2 Permissible speed in r.p.m.
3 Nominal size
4 Material (coded)
5 Test mark
6 Maximum working speed in m/s
Grinding Wheel Check
Before a new grinding wheel is mounted it should be
subjected to a visual inspection and a resonance test,
to detect any possible defects or cracks. For the reso-
nance test, let the wheel hang from a piece of string and
tap lightly with a screwdriver handle or similar (no metal!).
If the sound is not clear, but rather dull and hollow the
wheel is likely to be damaged and should not be used.
8
The grinding wheel should slide onto the arbor easily.
Forcing it on the arbor, e.g. by striking with a hammer,
may break the wheel and is not permissible for safety
reasons. For the same reason the drilling out of too small
an arbor bore is not permitted.
After the new wheel is mounted it should be left running
idle for at least 5 minutes. Screen off workplace to pre-
vent damage in case the wheel breaks and stay out of
the danger zone.
Grinding Wheel Wear
Grinding wheels will naturally wear down with use. This
requires a regular resetting of the tool rest and adjusting
protective plate to the gap size as shown in figure 4.
When a certain minimum wheel diameter is reached the
tool rest can not be set any closer and the wheel has to
be replaced. Depending on the grinding wheel diameter
the following minimum wheel diameters (d
Dry grinding wheels:
150 Ø
d 110 mm
min
Wet grinding wheels:
The work piece supporting mechanism does not need
to be readjusted in the case of wet grinding wheels.
Make sure that the grinding wheel is replaced when the
minimum diameter has been reached (at the latest!).
150 Ø
d 65 mm
min
Changing the dry grinding wheel
If the dry grinding wheel is worn and must be replaced,
or you would like to use another type of grinding wheel,
the old grinding wheel must first be removed as shown
in Figure 9.
1
9
1 Hexagon head screw
2 Hexagon nut (possibly with serrated lock washer)
3 Outer cover
4 Hexagon nut
5 Clamping flange
6 Grinding wheel
7 Rotary shaft
Changing the wet grinding wheel
Let the water drain out of the water holder.
Undo the two hexagon screws on the water container
(black arrows).
Pull down the water container.
11
) apply:
min
175 Ø
130 mm
175 Ø
65 mm
4
5
6
7
2
3